Power supply is DC 9V with center negative (original model is PA-1 or PA-1B) or use 5X 1,5V batteries.

SOUND VSS system handles sampling process + a bunch of presets on the wavetable.VSS SAMPLING process is monophinic and based on a YM2416 IC (common on all VSS series) + DRAM at 8 bits resolution with 2 fixed rates: